Home / 5,087.80-7,020.84-2,991.52

Finding the Fourth Proportional to 5,087.80, 7,020.84 and 2,991.52

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Solution

The fourth proportional to 5,087.80, 7,020.84 and 2,991.52 is: 4,128.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,087.80 : 7,020.84 = 2,991.52 : x
  2. Step 2: Convert to fraction form
    5,087.80/7,020.84 = 2,991.52/x
  3. Step 3: Cross multiply
    5,087.80x = 7,020.84 × 2,991.52
  4. Step 4: Simplify right side
    5,087.80x = 21,002,983.28
  5. Step 5: Solve for x
    x = 21,002,983.28/5,087.80
  6. Step 6: Final answer
    x = 4,128.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.